Classic ASP

Poll a Socket for Available Data

Demonstrates Socket.PollDataAvailable, which performs a nonblocking check for readable activity and returns whether data or another read-ready condition is present.

Background. This lets an application check for incoming data without blocking, for example in an event loop that services multiple tasks.

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Classic ASP

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

set socket = Server.CreateObject("Chilkat.Socket")

'  Connect to the server using TLS.
bTls = 1
maxWaitMs = 5000
success = socket.Connect("example.com",5000,bTls,maxWaitMs)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( socket.LastErrorText) & "</pre>"
    Response.End
End If

'  Perform a nonblocking check for readable data.  Returns 1 when data or another read-ready
'  condition is present, and 0 when nothing is immediately available.
bAvailable = socket.PollDataAvailable()
If (bAvailable <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( "No data is immediately available.") & "</pre>"
Else
    Response.Write "<pre>" & Server.HTMLEncode( "Data is available to read.") & "</pre>"
End If


%>
</body>
</html>